Looking for people using moodle with dimdim on a hosted (shared) server - their expeeince and recommendations

Our Background:

* We are a child dev. and teaching training organisation. * Want to install and run online courses on moodle. Maybe 5-10 courses with total userbase of 200 people. MAybe concurrent users of 20-30. * Would want to add web-classroom features with VOIP (opensourse like "dimdim" which can be integrated into moodle itself) Simultaneous users for this could be around 15-25.

May not be able to afford dedicated server right now.Is it advisable ot put both moodle and dimdim together on a hosted server i f yes which one?